[thredds] ISO conforming XML for Map Projection Parameters re: UnidataDD2MI.xsl

• To: thredds@xxxxxxxxxxxxxxxx
• Subject: [thredds] ISO conforming XML for Map Projection Parameters re: UnidataDD2MI.xsl
• From: John Ritchie <jritchie@xxxxxxxx>
• Date: Fri, 28 Sep 2018 14:16:48 -0700

Folks,

I am relatively new to the world of metadata and have exhausted my web
search
capacities in an attempt to address the issue below.
I am modifying UnidataDD2MI.xsl.2.3.4 to accommodate WRF model netcdf data
on a Lambert Conic projection.
If it is not appropriate that I address this group  regarding this, I would
be monumentally grateful if anyone could please suggest an appropriate
avenue of pursuit.  Thank you!

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-

I wish to describe a Lambert projection in more detail than apparently
allowed by gmd:referenceSystemInfo using the http://www.isotc211.org/2005
standards, i.e.:


    <gmd:referenceSystemInfo> <gmd:MD_ReferenceSystem>
        <gmd:referenceSystemIdentifier> <gmd:RS_Identifier>
            <gmd:code> <gco:CharacterString>
                Lambert Conformal Conic Projection with 2 std parallels
LCC(2SP) EPSG:9802
            </gco:CharacterString> </gmd:code>
            <gmd:codeSpace> <gco:CharacterString>
                    EPSG
            </gco:CharacterString> </gmd:codeSpace>
        </gmd:RS_Identifier> </gmd:referenceSystemIdentifier>
    </gmd:MD_ReferenceSystem> </gmd:referenceSystemInfo>


I would like to find a place to add the projection parameters, e.g.:

    <gmd:projectionParameters> <gmd:MD_ProjectionParameters>
        <gmd:latitudeOfProjectOrigin>34.5</gmd:latitudeOfProjectOrigin>

<gmd:longitudeOfCentralMeridian>-135.0</gmd:longitudeOfCentralMeridian>
        <gmd:standardParallel>30.0</gmd:standardParallel>
        <gmd:standardParallel>45.0</gmd:standardParallel>
    </gmd:MD_ProjectionParameters> </gmd:projectionParameters>

I have seen references regarding MD_CRS being struck from ISO 19115 and
perhaps indicating that projection  parameters could be represented using
ISO 19111:2007 , however, apart from some Excel files in Github
repositories, I cannot find a publically available version of the schema,
nor can I find any online examples of complex projections being represented
in ISO metadata apart from simple ISO 19115 EPSG references like that above.

Although primarily in meta-discussions of metadata, I have seen references
referring
to an SC_ProjectedCRS as part of ISO 19111:2007 and others
implying that in addition to <gmd:referenceSystemIdentifier> there is a
<gmd:referenceSystemType> element that can follow it within
<gmd:referenceSystemInfo>
yet my attempts to invoke are rejected by Oxygen with my current suite of
http://www.isotc211.org/2005 validation links:

    <gmi:MI_Metadata
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
     xmlns:gco="http://www.isotc211.org/2005/gco";
     xmlns:gmd="http://www.isotc211.org/2005/gmd";
     xmlns:gmi="http://www.isotc211.org/2005/gmi";
     xmlns:srv="http://www.isotc211.org/2005/srv";
     xmlns:gmx="http://www.isotc211.org/2005/gmx";
     xmlns:gsr="http://www.isotc211.org/2005/gsr";
     xmlns:gss="http://www.isotc211.org/2005/gss";
     xmlns:gts="http://www.isotc211.org/2005/gts";
     xmlns:gml="http://www.opengis.net/gml/3.2";
     xmlns:xlink="http://www.w3.org/1999/xlink";
     xmlns:xs="http://www.w3.org/2001/XMLSchema";
     xsi:schemaLocation="http://www.isotc211.org/2005/gmi
     http://www.ngdc.noaa.gov/metadata/published/xsd/schema.xsd";>

Thus I get the impression that my understanding of available resources
is dated.


Can anyone suggest a method/schema that would allow me to add the
projection parameters to my ISO metadata?  Thanks!

Cheers,
Jack

-- 
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                   Jack Ritchie / UCSD / SIO / CASPO / CW3E
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